Transmission device.



G. A. STREET. TRANSMISSION DEVICE,

APPLIOATION FILED DEG. 23, 1912.

Patented Feb. 6

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IIVVEIIITOR 5% Efwef WITNESSES G. AFSTREET.

TRANSMISSION DEVICE.

APPLICATION FILED DEC. 23. 1912.

Patented Feb. 16, 1915.

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sent a practical construction ternal CHARLES A. STREET, 01? ST. LOUIS, 'MISSUURII TRANSMISSION DEVICE.

Specification of Letters Patent.

'Patenterll Feb. 3%,.119115.

' Application filed December 23, 1912. Serial N0. ?3Q8,3d4i.

To all whom it may concern Be'it known that l, CHARLES A. STREET, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improve ments in Transmission Devices, of which the following is a specification.

The invention has for an important object to give a construction whereby an ingear forming an integral part of a wheel hub and extending across the major plane of the wheel, may be utilized.

A. further object is to give a construction whereby a driving pinion may be mounted in the journal of the wheel and moved orbitally.

A further important object is to utilize such movement of the driving pinion to control operation of the mechanism inv certain particulars.

lit is also an aim'of the invention to prewhich may be economically produced. With these and other objects the invention consists of the novel features of construction and combination of parts shown in the annexed drawings, to which reference is hereby made, and in which,

Figure l is a vertical section coincident with the axis of the wheel, Fig. 2 is a cross section on the line A-A of Fig. 1. Fig. 3 is an elevation of the device, Fig. 4 is an elevation of a motor-bicycle.

There is illustrated a motor-cycle, the rear wheel of which has my invention incorporated therein, the bicycle being otherwise accordance with practices cusconstructed in tomary in the art. (Jarried by the rear forks of the bicycle frame there is a stationary the frame axle 17 one end of which, for mechanical convenience, is bent upwardly at right angles closely adjacent the fork, as at 17 being secured on the upturned portion by means of nuts 23 and 24. Revoluble on this shaftbetweenthe forks'there is a casing formed in two pieces 12 and 13, secured together by means of bolts 14, 15 and 16 having nuts thereon outwardly of one side of the casing, the heads of the bolts being piece 12. The casing is held on the axle 17 by the nut 19, and an outer nut .20 is also provided on the shaft for holding the adjacent fork of the frame upon the shaft. A hub 2 is disposed revolubly around the casing, and suitable ball bearing raceways preferably countersunk in the 5 and 6 are formed between the hub and casing adjacent each side. The hub is provided with the usual spoke attaching flanges 27 and28. The barrel portion of the hub comprises an internal spur gear 1, concentric with the axle 17, the raceways 5 andfi being also concentric with the axle. casing pieces 12 and 13 are provided bearings 7 and 8 carrying a shaft which is the gear 3 meshed with the The with 4. upon gear 1,

I and clearing the axle 17, the body of the easdriving element 30, directly connected to the hub.

The device being assembled, and the usual driving belt engaged with the pulley 9, so as to be taut when the shaft 4: is located at or near the rear limit of its movement'with the casing around the axle 17, it will be seen that when the control lever 18 of the motorcycle is operated to draw upon the arm 25, which is in this case extended radially outwardly of the shaftd, the shaft will be moved forward, loosening the belt. Correspondingly, reverse operation of the lever will tighten the belt. The belt engaged with the pulley 9 may be the sole driving belt, or may be supplementary to one engaged with the pulley 30, and separately controlled.

What is claimed:

1. A transmission device for vehicles consisting of a rotary hub having aninternal gear, a spur-pinion meshing with said internal gear, a shaft engaged therewith, a pulley secured to one end sectional casing carrying the shaft, and two bearings between and concentric with .said casing and said rotary hub at respective sides.

of said shaft, 2.

2. A transmission device for vehicles conhub, said sectional casing being mounted on said stationary axle,adriving pinion mounted revolubly in the casing in mesh with the gear, operative connections therefor, and operating means connected to said arm.

3 A transmission device for vehicles consisting of a rotary hub, having an internal gear, a spur-pinion meshed with the gear, a shaft carrying the pinion, a pulley on the shaft, a sectional casing revolubly engaged with thehub and having said shaft eccentrically mounted thereon, an arm extending from said sectional casing, operative connections for said arm, a stationary axle supporting the casing concentrically, and means lflor1 attaching said stationary axle to a ve- 4:. In a transmissiondevice for vehicles,

a rotary hub, having an internal gear, a

spur-pinion meshed with the gear, a shaft carrying said spur-pinion, a sectional casing revolubly mounted on the hub, said shaft journaled eccentrically in the casing, a pulley secured to said shaft, an arm on said casing, operative connections for said arm, two ball-bearing race-Ways, between the hub and casing engaged in the casing and a stationary axle, and means for attaching saidstationary axle to a vehicle.

In testimony whereof I hereunto aflix my signature in presence of two Witnesses.

CHARLES A. STREET,

Witnesses:

Gus. I. STREET, SALLIE C. STREET. 

